[Elecraft] KPA500 power output starts out low, then goes up

[iain macdonnell - N6ML]

I didn't see anything in this thread that suggested that the problem
wasn't observed on all bands. Maybe I missed it?

Also haven't noticed anyone suggest using the K3's "TUNE" function,
instead of SSB modulation, as a test. If the output ramps up with the
TUNE function, it's an output problem. If it doesn't, it might be an
issue of insufficient audio input for SSB modulation. (AFAIK) the K3
will automatically boost the audio input if it detects that there's
not enough (a feature that I'm not particularly fond of).

73,

    ~iain / N6ML



On Wed, Nov 16, 2016 at 9:56 AM, Jack Brindle <jackbrindle at me.com> wrote:
> A TR switch failure would affect all bands. This one is a bit different. It will be interesting to see the cause when we finish troubleshooting.
>
> Jack Brindle, W6FB
> Elecraft Engineering
>
> Sent from my iPhone
>
>> On Nov 16, 2016, at 12:04 PM, Arie Kleingeld PA3A <pa3a at xs4all.nl> wrote:
>>
>> This might be a problem with the pin diode T/R switching in the KPA500.
>>
>>
>> 73,
>>
>> Arie
>>
>>
>>
>>
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